package com.example.demoone.kotlin

//全局常量
const val PI = 3.14

fun main() {
    //1.变量
    var name = "张三"
    name = "李四"
    println("姓名是: $name")

    //2.常量
    val age = 18
    println("年龄是: $age")

    println("版本是: $PI")
}